Method of treating pulverized vegetable fuels



Patented May 8, 1928.

SAICHI SHIMAMOTO, OF TOKYO, JAPAN.

METHOD OF TREATING PULVERIZED VEGETABLE FUELS.

No Drawing.

My invention relates to a method of treating sawdust, chips of Wood,chaff andother )ulvcrized ve "ct-able fuels.

the invention is to obtain such The object of pulverized vegetable fuelsas burn easily and long, produce little smoke and possess power.

Hitherto, wood eat heating pieces such as chips of wood and sawdust havebeen diflicult to burn in a furnace of ordinary construction, and

f special construct on Sawdust is sometherefore a furnace 0 has beenused for them.

times pressed and solidified with pasty matter, but it is weak inheating power and does not burn long, being quite unfit domestic andfactory use. ing to the present invention pulv table fuels are treatedby as fuel for However, accorderized vegea very simple process, andfuels which burn easily and long,

produce little smoke and ing power can be obtained. T feature of theinvention consists powdered vegetable fuels like lime water sticky andthen dryingthe same.

In this invention water possess pulverized vegetable fuels therei themilk of lime will act upon the tissue of i steep 20 to 23 kilograms ofsawd great heathe essential in steeping sawdust in so as to make themsoft and is added to quick lime to slake it, at the same time throwingnto. Then,

nature and and sticky enough to facili- 7 Moreover, enables the ofcarrying quick lime ter to slake it, and

ust or chips of wood or chafi' and other pulverized vegetable fuels init while it is still the occasion, temperature is sometim blowing steamthereinto. Then,

part will become soft and sticky.

same alone for several hours.

Leave On this es raised. by the wooden Mix 10 to hot.

ecting of lime solution to soften the sznvdust so that it may bethereafter pressed into briquettes, the amount of sawdust as great asthe amount of lime. mixin Application filed November 1, 1926. Serial No.145,707.

14 kilograms of powdered coal with the above and press and solidify themixture into the desired shape. Sometimes, little pieces of weeds orstraw are mixed with the above sawdust and other pulverized vegetablefuels and steeped in lime water.

In the present invention the pulverized vegetable fuels made soft andsticky with milk of lime are sometimes solidified as they are in littlelumps and, after dried, are used together with such fuels as coal, etc.,by scatteringtl'iem on the latter, or, after solidifled into the desiredshape, have heavy oil or other liquid fuel absorbed. The lime water usedin this invention is sometimes mixed. with starch paste or other pastymatof the fuels.

Having now ascertained the nature. of my said invention and in whatmanner the same is to be performed, I declare that what I claim is 1.The process of converting pulverized wood materials into a fuel havingeasy burning, small smoke forming and large heat producing qualitieswhich consists in subjecting sawdust to the action of a hot milk of limesolution to soften the sawdust so that it may be thereafter pressed intobriquettes, mixing powdered coal therewith and then pressing and dryingthe resulting product. 6

2. The process of converting pulverized wood materials into a fuelhaving easy burning, small smoke forming and large heat producingqualities which consists in subsawdust to the action of a hot milk beingabout five times g powdered coal therewith and then pressing and dryingthe resulting product.

In testimony whereof I have aflixed my signature.

SAICHI SHIMAMOTO.

